Re: [Libcdio-devel] About old branches of mine

[Thomas Schmitt]

Hi,

Rocky Bernstein wrote:
> if xoriso or some other burner program in the past created ISO 9660 images
> in a particular way,

xorriso still produces the larger ISOs by default. Normally it does not
matter to have 300+ KiB of waste, while the advantage is safety against
the Linux TAO CD bug and the capability for recording a multi-session
history.

Whatever, do i get it right that you want me to add the old wasteful ISO
to test/check_multiextent.sh like this ?

  for i in multi_extent_8k.iso \
           multi_extent_8k_big.iso \
           multi_extent_8k_joliet.iso
  do
    ... test ...


Already finding a good name for the "_big" ISO is difficult. I am
reluctant to call it "_wasteful" because it's waste only in the context of
libcdio tests. "_old" would be wrong too, because it is still the default
with xorriso. But "_default" would open the question what's wrong with
it or with the other non-default ISO.
It boils down to the fact that i cannot give a convincing motivation for
its existence.

A compromise would be to replace both by an ISO which just lacks the end
padding but has the multi-session preparation:

  dd bs=2048 count=96 if=multi_extent_8k_big.iso \
                      of=multi_extent_8k.iso

This would remove the end padding which is not counted as part of the ISO
filesystem (other than results from the mkisofs emulation). The result has
196608 bytes rather than 524288.
People might wonder why the ISO for the Joliet test is still smaller.


Have a nice day :)

Thomas